Language Support

The Cloud Speech-to-Text uses a speech recognition engine that can
understand one of a wide variety of languages. These languages are
specified within a recognition request's languageCode parameter.
Each language code parameter consists of a
BCP-47 identifier. These tags are
typically of the form language-region, where language refers to
the primary language and region refers to the region (usually a
country identifier) of the particular dialect. For example, English
may either be represented by American English (en-US), or British
English (en-GB).